package com.merry.mq.helloWorld;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

/**
 * @author frx
 * @version 1.0
 * @date 2022/7/23  22:21
 * desc:消费者：接受消息
 */
public class Consumer {

    //队列的名称
    public static final String QUEUE_NAME="hello";
    //接受消息
    public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setUsername("admin");
        factory.setPassword("123456");
        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();

        //声明接收消息
        DeliverCallback deliverCallback = (consumerTag, message) -> {
            //消费者成功消费的回调函数
            //message 根据业务逻辑接收的消息，比如xml文件。
            System.out.println("消费者成功消费。。"+new String(message.getBody()));
        };

        //取消消息时的回调
        CancelCallback cancelCallback = consumerTag ->{
            System.out.println("消息消费被中断");
        };

        /**
         * 消费者消费消息
         * 1.消费哪个队列
         * 2.消费成功之后是否要自动应答true：代表自动应答false:代表手动应答
         * 3.消费者成功消费的回调
         * 4.消费者取消消费的回调
         */
        channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);
    }
}

